1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.example.android.supportpreference; 18 19 import android.app.Activity; 20 import android.app.Fragment; 21 import android.os.Bundle; 22 23 import androidx.preference.PreferenceFragment; 24 import androidx.preference.PreferenceScreen; 25 26 /** 27 * Demonstration of PreferenceFragment, showing a single fragment in an 28 * activity. 29 */ 30 public class FragmentSupportPreferences extends Activity 31 implements PreferenceFragment.OnPreferenceStartScreenCallback { 32 33 @Override 34 protected void onCreate(Bundle savedInstanceState) { 35 super.onCreate(savedInstanceState); 36 37 // Display the fragment as the main content. 38 if (savedInstanceState == null) { 39 getFragmentManager().beginTransaction().replace(android.R.id.content, 40 new PrefsFragment()).commit(); 41 } 42 } 43 44 @Override 45 public boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) { 46 final Fragment f = new PrefsFragment(); 47 final Bundle args = new Bundle(1); 48 args.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey()); 49 f.setArguments(args); 50 getFragmentManager().beginTransaction().replace(android.R.id.content, f) 51 .addToBackStack(null) 52 .commit(); 53 return true; 54 } 55 56 //BEGIN_INCLUDE(support_fragment) 57 public static class PrefsFragment extends PreferenceFragment { 58 59 @Override 60 public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { 61 // Load the preferences from an XML resource 62 setPreferencesFromResource(R.xml.preferences, rootKey); 63 } 64 } 65 //END_INCLUDE(support_fragment) 66 } 67
